# nativeWindowSpec

A native window spec record carrying id, ownerId, title, width, height, and related state.

Last updated: 2026-09-09

Package: window.multi | Status: source-declared

Tags: cpu, method, multi, source-example, thing, window, window.multi, yeho

Describe multiple windows, input events, lifecycle, and capabilities with typed records.

```yh
external thing nativeWindowSpec
```

- text id: Stores id as text.
- text ownerId: Stores owner id as text.
- text title: Stores title as text.
- int width: Stores width as int.
- int height: Stores height as int.
- bool visible: Stores visible as bool.
- nativeWindowSpec(text id, text ownerId, text title, int width, int height, bool visible): Native window spec.
- Validate() returns text: Validate.

## Use nativeWindowSpec

A complete small caller. Values are illustrative; check the returned result and package requirements before connecting live resources.

Verification: type checked

```yh
using window.multi

// Describe multiple windows, input events, lifecycle, and capabilities with typed records.
nativeWindowSpec sample = nativeWindowSpec("id", "owner Id", "Inventory", 1, 1, true)
Console.Log(Text.From(sample.id))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.window_multi__nativewindowspec"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "window.multi"
version = "0.1.0"
path = "../../../yeho/packages/window/multi"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/window.multi--nativeWindowSpec/usage --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


## nativeWindowSpec.Validate

A complete caller for this public method. Sample inputs are illustrative; native resources require their owning lifecycle.

Verification: type checked

```yh
using window.multi

// Validate.
nativeWindowSpec instance = nativeWindowSpec("id", "owner Id", "Inventory", 1, 1, true)
text result = instance.Validate()
Console.Log(Text.From(result))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.window_multi__nativewindowspec"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "window.multi"
version = "0.1.0"
path = "../../../yeho/packages/window/multi"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/window.multi--nativeWindowSpec/method-Validate-7 --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


Package presence and a declaration do not establish support on every host. Host services need their platform and lifecycle setup.

Source: yeho/packages/window/multi/00-contracts.yh

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